refactor(core): CORE-18 type builtins and own prompt lifetimes

test/types/notice.ts

@@ -0,0 +1,22 @@
+import type Notice from '../../packages/artplayer/src/notice'
+import type Artplayer from '../../packages/artplayer/types/artplayer'
+
+declare const notice: Notice
+declare const art: Artplayer
+const visible: boolean = notice.show
+notice.show = 'message'
+notice.show = new Error('message')
+notice.show = false
+notice.show = ''
+const timer: number | null = notice.timer
+const destroyed: void = notice.destroy()
+// @ts-expect-error The runtime getter returns visibility, not message text.
+const text: string = notice.show
+// @ts-expect-error True is not a declared message input.
+notice.show = true
+// @ts-expect-error Arbitrary objects are not declared message inputs.
+notice.show = {}
+// Preserve old legal consumers until CORE-21 coordinates an explicit precise view.
+const legacy: string | Error | false = art.notice.show
+art.notice.show = false
+export { destroyed, legacy, text, timer, visible }